I don't mind giving out my shipping charges, they are $1.75 per loaded mile for an open trailer and $2.25 per loaded mile for enclosed plus 50 cents a mile for deadheading. Of course this is the pie in the sky number if you want it done ASAP and will always be cheaper if I have something coming or going close to where the pick-up and the drop-off is. If either is less than 200 miles from either then I don't charge for deadheading..
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.